Steam and an ipad, or maybe if you can live with the screen size, an iPhone 6+. Runway HD and Skydemon have got it nailed, and add all the other gizmos you can buy for these portable devices and there is no need for anything with an aviation label and a pricetag to match. IMHO of course ! I've no personal experience of SAS/Autopilot on R44 but when I used to fly for pure pleasure, holding the controls was part of the fun.
HTH